Beware: SmartPlaylist is NOT 100% compatible with iOS7 (thank you, Apple!). Currently, I don't have the motivation to invest hours and days again, just to make it work as before.
So, just stay with iOS6.
UPDATE: Be patient. I am now working on a new version adapted to iOS 7.
UPDATE2: I'm actually quite happy now that I had to rework my app for iOS 7. Seeing an app still in the old iOS 6 style makes me shudder (so ugly).
